Speed-governor



(k0 Model.)

B. MGKENNA.

SPEED GOVERNOR. No. 326,881. Patented Sept. 22, 1885.

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Mrs STATES ATENT FFICE.

ROBERT MOKENNA, OF \VHITE, TENNESSEE.

SPEED-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 326,881, dated September 22, 1885.

(No model.)

To all whom it may concern.-

Be it known that I, ROBERT McKENNA, a citizen of the United States, residing at White, in the county of Shelby and State of Tonnes see, have invented a new and useful Speed- Governor, of which the following is a specification.

My invention relates to a duplex ball speedgovernor; and it consists in the construction, arrangement, and combination of parts substantially as hereinafter set forth, the object being to produce a speed-governor which shall be simple and cheap of construction, efficient of service, and not liable to get out of order. I attain these objects by the mechanism illustrated in the accompanying drawing, which is a vertical sectional elevation of my duplex ball speed-governor.

Similar letters refer to similarparts th roughout the drawing, the figure 2 being placed near the upper right-hand corner of the letters in part 2 to designate the parts of part 2 from those of part 1.

A is the frame, B the driving-shaft, O the miter-gear, D the main shaft, E the arms, 0 the arm-pins, F the balls, and M the valvestem of my duplex ball speed governor, all of which are constructed, arranged, and, excepting valve-stem M, operated in a manner similar to that in which like parts are con structed, arranged, and operated in an ordinary ball speed-governor.

A novel and important principle of construction and arrangement will now be ex plained in connection with the device as described.

A flanged hub, h, sleeves onto valve-stem M, and is secured thereon by a set-screw, S. A threaded stud, 9, screws into a threaded hole in the pivotal ends of arms E, and is horizontally adjustable therein with reference to flange K on flanged hub h, and can be retained after adjustment by a jam-nut, n. A

hub, 19, having a thread on its outside surface, sleeves onto the lower part of valve-stem M, and is secured thereon by a set-screw, V. Hubp is adapted to screw up and down in a nut, T, which latter is secured in frame A.

The device as now described constitutes part 1 of my duplex ball speed-governor.

A frame, A miter-gear, 0 main shaft D arms E, arm-pins 0 balls F studs g, jamnuts n flanged hub h flange K set-screw f, and valve-stem M when combined and arranged with part 1, substantially as set forth, constitute part 2 of my duplex ball speedgovernor. Parts 1 and 2 are rotated by one and the same driving-shaft, 13, part 2 being rotated in the reverse direction from that of part 1. One and the same valve-stem, M, extends vertically through the center of both parts 1 and 2, and is rotated by part 1 when necessary to open the governor-valve to regulate the speed of the engine, and by part 2 when necessary to close the governor-valve to regulate the speed of the engine. Vhen the engine is in motion at the desired speed, balls F will swing at an elevation that will bring the free ends of studs 9 and 9' close to the outer edge of flanges K and K". A further outthrow of balls F will press studs 9 toward flanged hub h", causing stud to engage with flange K. While thus engaged stud g", which rotates with main shaft Diwill rotate valve-stem M, causing valve-stem M to screw down in nut T, thereby closing the governor-valve, so as to regulate the speed of the engine. An infall of balls F will press studs 9 toward flanged hub h, causing stud to engage with flange K. Vhile thus engaged stud y will rotate valvestem M, causing valve-stem M to screw upin nut T, thereby opening the governor-valve, so as to regulate the speed of the engine. \Vhen valve-stem M moves in either direction to the full extent of its travel, the engaged flange K or K will have passed above or below the propelling-stud g or g",and valvestem M will have ceased to rotate.

By adjusting studs 9 and g a change of the speed of the engine can be attained.

I claim 1. The combination of flanged hub h, flange K, set-screw S, stutsy, jam-nuts a, hub 11, nut T, and set-screw V, with frame A, drivingshaft B, miter-gears 0, main shaft D, arms E, arm-pins 0, balls F, and valve-stem M, sub stantially as set forth.

2. The combination of part 2, consisting of frame A miter-gear 0 main shaft D", arms E arm-pins O' balls F studs jamnuts 1?, valve-stem M, flanged hub h flange K, and set-screw S,with part 1, consisting of frame A, driving-shaft B, miter-gear 0, main shaft D, arms E, arm-pins 0, balls F, 5 studs 9, jam-nuts n, valve-stem M, flanged hub h, flange K, set-screw S, threaded hub p, set-screw V, and. nut T, when constructed,

arranged, and combined substantially as set forth.

ROBERT MOKENNA.

Witnesses:

HU. B. WHITE, R. H. NORRIS. 

